Catalysts with noble metals on the basis of hyper-crosslinked polystyrene for hydrogenation of aromatic hydrocarbons

In order to develop an effective catalyst for the low-temperature
hydrogenation of aromatic hydrocarbons the authors prepared and
studied a series of catalysts containing precious metals on the support – hyper-cross-linked polystyrene, which has developed specific surface area (> 1000 m2/g) and high thermal stability. There are tests of Pt-and Pd-containing catalysts based on hyper-cross-linked polystyrene, carbon and alumina supports in hydrogenation reactions of simple (benzene, toluene), branched (n-butylbenzene) and polycyclic (terphenyl) aromatic compounds. Found that in reactions of hydrogenation of aromatic hydrocarbons on the activity of hypercross-linked polystyrene catalysts are comparable or higher than the activity of catalysts with noble metal catalysts based on Al2O3 and sibunit; the hyper-cross-linked polystyrene catalysts have higher selectivity for the hydrogenation of benzene in a mixture of benzene and toluene. By IR spectroscopy of adsorbed CO the electronic state of metals was studied in the Pt (Pd)/hyper-cross-linked polystyrene catalysts. When the catalysts testing in hydrogenation of terphenyl it was found that the Pt-containing catalyst at hyper-crosslinked polystyrene can reversibly work in cycles of hydrogenationdehydrogenation (terphenyl – tercyclohexane), what is promising for the use such catalytic systems for the creation of composite materials for hydrogen storage.

1. Somorjai G. Introduction to Surface Chemistry and Catalysis, Wiley, 1994.

2. Reyes P. et al. Catal. Lett., 1996, Vol. 37. № 3—4. Р. 193.

3. Gates B.C. Chem. Rev., 1995, Vol. 95. № 3. Р. 511.

4. Fraga M.A., Jordao E., Mendez M.G., Freitas M.M.A., Faria J.L., Figueriedo J.L. J. Catal., 2002, 209. 355—364.

5. Woehrle D., Pomogailo D. Advanced Functional Molecules and Polymers (Ed. H. Nalva), Gordon & Breach Publ. Group (2003).

6. Tsyurupa M.P., Maslova L.A., Andreeva A.I., Mrachkovskaya T.A., Davankov V.A. Reactive Polymers, 1995, 25/1, 69—78.

7. Долуда В.Ю. Сверхсшитый полистирол, содержащий Pd, Pt-эффективный катализатор процессов гидрирования. XII Менделеевская школа-конференция студентов-химиков. Москва, 2001.

8. Sidorov S.N., Volkov I.V., Davankov V.A., Tsyurupa M.P., Valetsky P.M., Bronstein L.M., Karlinsey R., Zwanziger J.W., Matveeva V.G., Sulman E.M., Vakina N.L., Wilder E.A., Spontak R.J. J. Am. Chem. Soc., 2001, 123, 10502–10510.

9. Stytsenko V.D. Appl. Catal., A, 1995, 126, 1—26.

10. Давыдов А.А. ИК-спектроскопия в химии поверхностных окислов. Новосибирск: Наука, 1984. 242 с.

11. Кустов Л.М., Тарасов А.Л., Богдан В.Ю. Пат. РФ № 2281154.